Features:1.Constant IC Controller will impove the led bulbs\' life span for it will keep the current stable even though the working voltage changes while working.2.The bulbs equipped with constant-current driving IC and Aluminum Circuit Board. Fast thermal diffusion ,heat-resistant, no digital and VHF radio signal interference.3.High power 3030 led chips, each bulb includes 21 pieces high power chips, much brighter than the normal chips in the market.4.Manufactured with high quality aluminum that is durable and weather resistant. All-in-one aluminum profile as heat conduction system,360 degree heat radiating5.IP65 waterproof makes it can work in any bad weather conditions. 6.Buy with confidence, We offer "ONE YEAR" warranty on item(s) .7.Quick and easy plug-and-play installation that fits right into original light housings.